-;;; -*- Package: ALPHA -*-
-;;;
-;;; **********************************************************************
-;;; This code was written as part of the CMU Common Lisp project at
-;;; Carnegie Mellon University, and has been placed in the public domain.
-;;;
+;;;; the Alpha implementation of unknown-values VOPs
-;;;
-;;; **********************************************************************
-;;;
-;;; This file contains the implementation of unknown-values VOPs.
-;;;
-;;; Written by Rob MacLachlan
-;;;
-;;; Converted to the Alpha by Sean Hallgren.
-;;;
+;;;; This software is part of the SBCL system. See the README file for
+;;;; more information.
+;;;;
+;;;; This software is derived from the CMU CL system, which was
+;;;; written at Carnegie Mellon University and released into the
+;;;; public domain. The software is in the public domain and is
+;;;; provided with absolutely no warranty. See the COPYING and CREDITS
+;;;; files for more information.
(in-package "SB!VM")
-
(define-vop (reset-stack-pointer)
(:args (ptr :scs (any-reg)))
(:generator 1
(move ptr csp-tn)))
+(define-vop (%%nip-values)
+ (:args (last-nipped-ptr :scs (any-reg) :target dest)
+ (last-preserved-ptr :scs (any-reg) :target src)
+ (moved-ptrs :scs (any-reg) :more t))
+ (:results (r-moved-ptrs :scs (any-reg) :more t))
+ (:temporary (:sc any-reg) src)
+ (:temporary (:sc any-reg) dest)
+ (:temporary (:sc non-descriptor-reg) temp)
+ (:ignore r-moved-ptrs)
+ (:generator 1
+ (move last-nipped-ptr dest)
+ (move last-preserved-ptr src)
+ (inst cmple csp-tn src temp)
+ (inst bne temp DONE)
+ LOOP
+ (loadw temp src)
+ (inst addq dest n-word-bytes dest)
+ (inst addq src n-word-bytes src)
+ (storew temp dest -1)
+ (inst cmple csp-tn src temp)
+ (inst beq temp LOOP)
+ DONE
+ (inst lda csp-tn 0 dest)
+ (inst subq src dest src)
+ (loop for moved = moved-ptrs then (tn-ref-across moved)
+ while moved
+ do (sc-case (tn-ref-tn moved)
+ ((descriptor-reg any-reg)
+ (inst subq (tn-ref-tn moved) src (tn-ref-tn moved)))
+ ((control-stack)
+ (load-stack-tn temp (tn-ref-tn moved))
+ (inst subq temp src temp)
+ (store-stack-tn (tn-ref-tn moved) temp))))))
-;;; Push some values onto the stack, returning the start and number of values
-;;; pushed as results. It is assumed that the Vals are wired to the standard
-;;; argument locations. Nvals is the number of values to push.
-;;;
-;;; The generator cost is pseudo-random. We could get it right by defining a
-;;; bogus SC that reflects the costs of the memory-to-memory moves for each
-;;; operand, but this seems unworthwhile.
+;;; Push some values onto the stack, returning the start and number of
+;;; values pushed as results. It is assumed that the Vals are wired to
+;;; the standard argument locations. Nvals is the number of values to
+;;; push.
;;;
+;;; The generator cost is pseudo-random. We could get it right by
+;;; defining a bogus SC that reflects the costs of the
+;;; memory-to-memory moves for each operand, but this seems
+;;; unworthwhile.
(define-vop (push-values)
(:args
(vals :more t))
(:info nvals)
(:temporary (:scs (descriptor-reg)) temp)
(:temporary (:scs (descriptor-reg)
- :to (:result 0)
- :target start)
- start-temp)
+ :to (:result 0)
+ :target start)
+ start-temp)
(:generator 20
(move csp-tn start-temp)
- (inst lda csp-tn (* nvals word-bytes) csp-tn)
+ (inst lda csp-tn (* nvals n-word-bytes) csp-tn)
(do ((val vals (tn-ref-across val))
- (i 0 (1+ i)))
- ((null val))
+ (i 0 (1+ i)))
+ ((null val))
(let ((tn (tn-ref-tn val)))
- (sc-case tn
- (descriptor-reg
- (storew tn start-temp i))
- (control-stack
- (load-stack-tn temp tn)
- (storew temp start-temp i)))))
+ (sc-case tn
+ (descriptor-reg
+ (storew tn start-temp i))
+ (control-stack
+ (load-stack-tn temp tn)
+ (storew temp start-temp i)))))
(move start-temp start)
(inst li (fixnumize nvals) count)))
-
-;;; Push a list of values on the stack, returning Start and Count as used in
-;;; unknown values continuations.
-;;;
+;;; Push a list of values on the stack, returning Start and Count as
+;;; used in unknown values continuations.
(define-vop (values-list)
(:args (arg :scs (descriptor-reg) :target list))
(:arg-types list)
(:policy :fast-safe)
(:results (start :scs (any-reg))
- (count :scs (any-reg)))
+ (count :scs (any-reg)))
(:temporary (:scs (descriptor-reg) :type list :from (:argument 0)) list)
(:temporary (:scs (non-descriptor-reg)) temp)
(:temporary (:scs (non-descriptor-reg)) ndescr)
(:generator 0
(move arg list)
(move csp-tn start)
-
+
LOOP
(inst cmpeq list null-tn temp)
(inst bne temp done)
- (loadw temp list cons-car-slot list-pointer-type)
- (loadw list list cons-cdr-slot list-pointer-type)
- (inst lda csp-tn word-bytes csp-tn)
+ (loadw temp list cons-car-slot list-pointer-lowtag)
+ (loadw list list cons-cdr-slot list-pointer-lowtag)
+ (inst lda csp-tn n-word-bytes csp-tn)
(storew temp csp-tn -1)
(inst and list lowtag-mask ndescr)
- (inst xor ndescr list-pointer-type ndescr)
+ (inst xor ndescr list-pointer-lowtag ndescr)
(inst beq ndescr loop)
- (error-call vop bogus-argument-to-values-list-error list)
-
+ (error-call vop bogus-arg-to-values-list-error list)
+
DONE
(inst subq csp-tn start count)))
-;;; Copy the more arg block to the top of the stack so we can use them
-;;; as function arguments.
-;;;
+;;; Copy the &MORE arg block to the top of the stack so we can use
+;;; them as function arguments.
(define-vop (%more-arg-values)
(:args (context :scs (descriptor-reg any-reg) :target src)
(skip :scs (any-reg zero immediate))
(zero
(move context src))
(immediate
- (inst lda src (* (tn-value skip) word-bytes) context))
+ (inst lda src (* (tn-value skip) n-word-bytes) context))
(any-reg
(inst addq context skip src)))
(move num count)
projects / sbcl.git / blobdiff